Easy to Install : 1, Thumb grip extended Cove : Just to align the hole of the joystick extended cover to the one side of the thumb grip then rotate it clockwise until the head of the joystick is fully embedded in the joystick extended cover. 2,Thumb Grip Protective Cover : Just to align the rabbet of the protective cover to the thumb grip, then push it in. Protect the Joystick : Silicone joystick thumb grip protective caps provide all-round protection for the thumb grip, against dust, sweat, wear and prevents the joystick from scratching. Broad Compatibility : Silicone joystick extended protective caps compatible with Steam Deck Game Joystick. Anti-slip Silicone Material : This joystick thumb grip cover made of silicone, The softness is moderate, feel better. Anti-slip design, no longer have to worry about the thumbs slipping off the analog stick, Let you play more carefree. Improve Game Play Experience : Thumb grip extended caps increase the height and contact area of your controller analog sticks to help with easier controls, reduce hand fatigue, Enhance the experience of playing the game.